Mundite Mineral Data

Mundite Mineral Data +

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General Mundite Information

Chemical Formula:

Al(UO2)3(PO4)2(OH)3·5(H2O)

Composition:

Molecular Weight = 1,168.11 gm

Uranium 61.13 % U 69.35 % UO₂

Aluminum 2.31 % Al 4.36 % Al₂O₃

Phosphorus 5.30 % P 12.15 % P₂O₅

Hydrogen 1.12 % H 10.02 % H₂O

Oxygen 30.13 % O

______ ______

100.00 % 95.89 % = TOTAL OXIDE

Empirical Formula:

Al(UO₂)₃(PO₄)₂(OH)₃·5(H₂O)

IMA Status:

Approved IMA 1981

Locality:

Kobokobo, Kivu, Zaire. Link to MinDat.org Location Data.

Name Origin:

Named for Walter Mund (1892-1956), radiochemist, University of Louvain, Belgium.

Mundite Image

Images:

Mundite

Comments: Bright yellow crystalline mundite grains.
Location: Kobokobo, Sud-Kivu, Zaire. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Mundite Crystallography

Axial Ratios:

a:b:c =0.5513:1:0.4441

Cell Dimensions:

a = 17.08, b = 30.98, c = 13.76, Z = 16; V = 7,280.94 Den(Calc)= 4.26

Crystal System:

OrthorhombicSpace Group: P 2₁cn,Pmcn

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.8(1), 3.37(0.7), 3.87(0.6),

Forms:

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Forms: [ 0 1 0] [ 1 0 0] [ 0 0 1]

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Physical Properties of Mundite

Cleavage:

[010] Perfect, [100] Perfect, [001] Perfect

Color:

Golden yellow, Light yellow.

Density:

4.295

Diaphaniety:

Translucent

Hardness:

2-3 - Gypsum-Calcite

Streak:

white

Optical Properties of Mundite

Gladstone-Dale:

CI meas= -0.147 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.156 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1557,KPDmeas= 0.1544,KC= 0.1347

Optical Data:

Biaxial (-), a=1.62, b=1.682, g=1.688, bire=0.0680, 2V(Calc)=32, 2V(Meas)=33.

Pleochroism (x):

weak yellow.

Pleochroism (y):

weak yellow.

Pleochroism (z):

weak yellow.

Calculated Properties of Mundite

Electron Density:

r_electron=3.74 gm/cc
note: r_Mundite=4.30 gm/cc.

Fermion Index

Fermion Index = 0.00454
Boson Index = 0.99546

Photoelectric:

PE_Mundite=1,594.96 barns/electron
U=PE_Mundite x r_electron=5,958.34 barns/cc.

Radioactivity:

GRapi = 4,532,249.69 (Gamma Ray American Petroleum Institute Units)

Mundite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 6.71 ± 1.68 grams of pure Mundite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 671.12 ±167.78 grams of pure Mundite .

**Estimated Radioactivity from Mundite** - very strong
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Bequerols (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.63 cm	109,426,316	2.96E-03	4,532,249.69	1,490.05
100 gm / 3.54 cm	10,942,632	2.96E-04	453,224.97	149.01
10 gm / 1.64 cm	1,094,263	2.96E-05	45,322.50	14.90
1 gm / 7.63 mm	109,426	2.96E-06	4,532.25	1.49
0.1 gm / 3.54 mm	10,943	2.96E-07	453.22	0.15
0.01 gm / 1.64 mm	1,094	2.96E-08	45.32	0.01
0.001 gm / 0.76 mm	109	2.96E-09	4.53	0.00

Weight of pure Mundite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.30 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem

Mundite Classification

Dana Class:

42.7.13.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.7)where (AB)5 (XO4)3 Zq · x(H2O)

(42.7.13)Dana Group

42.7.13.1 Mundite Al(UO2)3(PO4)2(OH)3·5(H2O) P 2₁cn,Pmcn Ortho

Strunz Class:

VII/E.07-20 VII - Phosphates, Arsenates and Vanadates

VII/E - Uranylphosphates and uranylvanadates with [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-

VII/E.07 - Phosphuranylite series

VII/E.07-10 Phuralumite Al2(UO2)3(PO4)2(OH)6·10(H2O) P 2₁/a 2/m

VII/E.07-20 Mundite Al(UO2)3(PO4)2(OH)3·5(H2O) P 2₁cn,Pmcn Ortho

VII/E.07-25 Yingjiangite (K2,Ca)(UO2)7(PO4)4(OH)6·6(H2O) Bmmb 2/m 2/m 2/m

VII/E.07-30 Phosphuranylite KCa(H3O)3(UO2)7(PO4)4O4·8(H2O) C mcm 2/m 2/m 2/m

VII/E.07-40 Phurcalite Ca2(UO2)3O2(PO4)2·7(H2O) P bca 2/m 2/m 2/m

VII/E.07-50 Arsenuranylite Ca(UO2)4(AsO4)2(OH)4·6(H2O) Bmmb 2/m 2/m 2/m

VII/E.07-60 Bergenite Ca2Ba4[(UO3)2O2(PO4)2]3(H2O)16 P 2₁/c 2/m

VII/E.07-70 Francoisite-(Nd) (Nd,Y,Sm,Ce)(UO2)3(PO4)2O(OH)·6(H2O) P 2₁/c 2/m

VII/E.07-80 Dewindtite Pb3[H(UO2)3O2(PO4)2]2·12(H2O) Bmmb 2/m 2/m 2/m

VII/E.07-90 Dumontite Pb2(UO2)3O2(PO4)2·5(H2O) P 2₁/m 2/m

VII/E.07-100 Hugelite Pb2(UO2)3(AsO4)2(OH)4·3(H2O) P 2₁/m 2/m

VII/E.07-110 Kamitugaite PbAl(UO2)5(PO4)2(OH)9·9.5(H2O) P1,P 1 Tri

VII/E.07-120 Kivuite? (Th,Ca,Pb)H2(UO2)4(PO4)2(OH)8·7(H2O) Unk Ortho

VII/E.07-130 Althupite ThAl(UO2)7(PO4)4(OH)5·15(H2O) P1 1

VII/E.07-140 Vanmeersscheite U(UO2)3(PO4)2(OH)6·4(H2O) P mn2₁ mm2

VII/E.07-150 Metavanmeersscheite U(UO2)3(PO4)2(OH)6·2(H2O) F dd2 mm2

Other Mundite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Mundite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Uranium Minerals 13 -École des Mines de Paris

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Print or Cut-and-Paste your Mundite Specimen Label here :

Mundite

Al(UO2)3(PO4)2(OH)3·5(H2O)
Dana No: 42.7.13.1 Strunz No: VII/E.07-20
Locality:

Notes: